Composite anode material made of ionic-conducting electrically insulating material
First Claim
1. Composite anode material comprising:
- core-shell particles, wherein each of a plurality of the core-shell particles comprises;
a non-porous primary particle configured to receive and release lithium ions, anda shell configured to allow for expansion of the non-porous primary particle upon lithiation thereof,wherein the shells of the core-shell particles are made of ionic-conducting, electrically insulating material, andwherein the core-shell particles comprise one non-porous primary particle fully enclosed by the shell; and
electrically conductive material, comprising conductive carbon fibers and/or CNTs (carbon nanotubes), wherein the conductive carbon fibers and/or CNTs electrically and physically interconnect the non-porous primary particles of different core-shell particles with each other and through the electrically insulating shells.
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Accused Products
Abstract
Core-shell particles, composite anode material, anodes made therefrom, lithium ion cells and methods are provided, which enable production of fast charging lithium ion batteries. The composite anode material has core-shell particles which are configured to receive and release lithium ions at their cores and to have shells that are configured to allow for core expansion upon lithiation. The cores of the core-shell particles are connected to the respective shells by conductive material such as carbon fibers, which may form a network throughout the anode material and possibly interconnect cores of many core-shell particles to enhance the electrical conductivity of the anode. Ionic conductive material and possibly mechanical elements may be incorporated in the core-shell particles to enhance ionic conductivity and mechanical robustness toward expansion and contraction of the cores during lithiation and de-lithiation.
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Citations
20 Claims
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1. Composite anode material comprising:
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core-shell particles, wherein each of a plurality of the core-shell particles comprises; a non-porous primary particle configured to receive and release lithium ions, and a shell configured to allow for expansion of the non-porous primary particle upon lithiation thereof, wherein the shells of the core-shell particles are made of ionic-conducting, electrically insulating material, and wherein the core-shell particles comprise one non-porous primary particle fully enclosed by the shell; and electrically conductive material, comprising conductive carbon fibers and/or CNTs (carbon nanotubes), wherein the conductive carbon fibers and/or CNTs electrically and physically interconnect the non-porous primary particles of different core-shell particles with each other and through the electrically insulating shells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of making an anode for a lithium ion cell comprising:
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producing core-shell particles to receive and release lithium ions at their cores and to allow for core expansion upon lithiation, within the respective shells, wherein the core-shell particles comprise one non-porous primary particle fully enclosed by the respective shell, and physically and electrically interconnecting non-porous primary particles of different core-shell particles with each other by electrically conductive material comprising conductive carbon fibers and/or CNTs, wherein the shells of the core-shell particles are made of ionic conducting material which is an electrically insulating material and the physical and electrical interconnection is carried out through the electrically insulating shells. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification